coresight: add STM driver support in upstream implementation

Add STM driver in upstream implementation of Coresight driver.

This change copies drivers/coresight/coresight-stm.c (commit :
90095b2ae1d987882f67c6d4a512baa98eecd6cb) to driver/hwtracing/coresight
directory.

Change-Id: Id023bf85df0345205ca8baa6a97ff340d5808aeb
Signed-off-by: Shashank Mittal <mittals@codeaurora.org>

3 files changed, 63 insertions, 0 deletions

diff --git a/include/linux/coresight-stm.h b/include/linux/coresight-stm.h
new file mode 100644
index 000000000000..375d96666f91
--- /dev/null
+++ b/include/linux/coresight-stm.h
@@ -0,0 +1,35 @@
+#ifndef __LINUX_CORESIGHT_STM_H_
+#define __LINUX_CORESIGHT_STM_H_
+
+#include <uapi/linux/coresight-stm.h>
+
+#define stm_log_inv(entity_id, proto_id, data, size)			\
+	stm_trace(STM_OPTION_NONE, entity_id, proto_id, data, size)
+
+#define stm_log_inv_ts(entity_id, proto_id, data, size)			\
+	stm_trace(STM_OPTION_TIMESTAMPED, entity_id, proto_id,		\
+		  data, size)
+
+#define stm_log_gtd(entity_id, proto_id, data, size)			\
+	stm_trace(STM_OPTION_GUARANTEED, entity_id, proto_id,		\
+		  data, size)
+
+#define stm_log_gtd_ts(entity_id, proto_id, data, size)			\
+	stm_trace(STM_OPTION_GUARANTEED | STM_OPTION_TIMESTAMPED,	\
+		  entity_id, proto_id, data, size)
+
+#define stm_log(entity_id, data, size)					\
+	stm_log_inv_ts(entity_id, 0, data, size)
+
+#ifdef CONFIG_CORESIGHT_STM
+extern int stm_trace(uint32_t options, uint8_t entity_id, uint8_t proto_id,
+		     const void *data, uint32_t size);
+#else
+static inline int stm_trace(uint32_t options, uint8_t entity_id,
+			    uint8_t proto_id, const void *data, uint32_t size)
+{
+	return 0;
+}
+#endif
+
+#endif
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index a7cabfa23b55..d22570d2a646 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -40,6 +40,13 @@
 
 extern struct bus_type coresight_bustype;
 
+enum coresight_clk_rate {
+	CORESIGHT_CLK_RATE_OFF,
+	CORESIGHT_CLK_RATE_TRACE = 1000,
+	CORESIGHT_CLK_RATE_HSTRACE = 2000,
+	CORESIGHT_CLK_RATE_FIXED = 3000,
+};
+
 enum coresight_dev_type {
 	CORESIGHT_DEV_TYPE_NONE,
 	CORESIGHT_DEV_TYPE_SINK,
diff --git a/include/uapi/linux/coresight-stm.h b/include/uapi/linux/coresight-stm.h
new file mode 100644
index 000000000000..164890e6ca04
--- /dev/null
+++ b/include/uapi/linux/coresight-stm.h
@@ -0,0 +1,21 @@
+#ifndef __UAPI_CORESIGHT_STM_H_
+#define __UAPI_CORESIGHT_STM_H_
+
+enum {
+	OST_ENTITY_NONE			= 0x00,
+	OST_ENTITY_FTRACE_EVENTS	= 0x01,
+	OST_ENTITY_TRACE_PRINTK		= 0x02,
+	OST_ENTITY_TRACE_MARKER		= 0x04,
+	OST_ENTITY_DEV_NODE		= 0x08,
+	OST_ENTITY_DIAG			= 0xEE,
+	OST_ENTITY_QVIEW		= 0xFE,
+	OST_ENTITY_MAX			= 0xFF,
+};
+
+enum {
+	STM_OPTION_NONE			= 0x0,
+	STM_OPTION_TIMESTAMPED		= 0x08,
+	STM_OPTION_GUARANTEED		= 0x80,
+};
+
+#endif